/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.myExample.duyutian.源码追踪.start;

import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.GenericFutureListener;

/**
 * Handles a server-side channel.
 */
public class DiscardServerHandler extends SimpleChannelInboundHandler<Object> {

    @Override
    public void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {
        // discard
        System.out.println("接收到了客户端的写入:" + msg);
        System.out.println("DiscardServerHandler");
        //往回寫
      /*ChannelFuture channelFuture = ctx.writeAndFlush(msg).addListener(new GenericFutureListener() {
            @Override
            public void operationComplete(Future future) throws Exception {
                System.out.println("是在flush中调用的，但是这个方法是同步的方法");
            }
        });*/
        /*ctx.write(msg).addListener(new GenericFutureListener() {
            @Override
            public void operationComplete(Future future) throws Exception {
                //真正调用该方法的是flush方法
                System.out.println("我写完了，但是这个方法是不会被调用的");
            }
        });*/
        //返回自己
        //ChannelHandlerContext flush = ctx.flush();
        ChannelFuture channelFuture = ctx.writeAndFlush(msg);
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        // Close the connection when an exception is raised.
        cause.printStackTrace();
        ctx.close();
    }
}
